InterProscan performs a functional analysis of a protein sequence by searching it against the InterPro database. This is a collection of protein domain and family models, called signatures, that try to predict the function of your protein by classifying it into a particular protein family and identify particular domains and other interesting sites in the sequence. InterPro signatures comprise profiles/motifs from many different protein domain/family databases.
All InterProScan results that are annotated to a protein sequence will have the Feature Type of "PROTEIN MATCH". This is NOT a valid GenPept keyword. You will need to manually curate any added annotation to choose the appropriate GenPept KeyWord.
See How do I Align Sequences help topic for an overview of MacVector's alignment tools.